What Is a Cost Segregation Study and How Much Can It Save You?
- Apr 4
- 6 min read
If you own commercial real estate, you are almost certainly overpaying your taxes.
Not because you are doing anything wrong. Because the default tax treatment of real property -- straight-line depreciation over 27.5 or 39 years -- leaves an enormous amount of money on the table. A cost segregation study is how you take that money back.
What Is a Cost Segregation Study?
A cost segregation study is an engineering-based tax analysis that identifies components of a commercial property that can be depreciated faster than the building as a whole.
The IRS allows you to depreciate certain components of a property -- electrical systems, specialty flooring, lighting, land improvements, and more -- over 5, 7, or 15 years instead of the standard 27.5 or 39 years. A cost segregation study does the engineering work to identify exactly which components qualify.
The result: you take larger deductions earlier. Depreciation that you would have spread across 39 years gets front-loaded into the first 5 to 15 years. That means real cash in your pocket -- now, not decades from now.
How Does It Work?
The process starts with an engineering-based analysis of the property. A qualified cost segregation firm reviews construction documents, performs a field inspection, and applies Construction Specification Institute (CSI) cost codes to every component of the building.
Each component is then assigned to the appropriate MACRS (Modified Accelerated Cost Recovery System) property class:
5-year property: personal property directly associated with business operations (specialty lighting, electrical for equipment, etc.)
7-year property: furniture, fixtures, and equipment (FF&E)
15-year property: land improvements (parking lots, sidewalks, landscaping, utility lines, drainage systems)
27.5-year or 39-year property: the base building structure (everything that does not qualify for a shorter life)
The more components that can be reclassified to shorter lives, the more depreciation you accelerate -- and the more you save.
At USA Cost Segregation, this analysis is powered by our proprietary technology platform, which brings AI-driven precision engineering to every study. The result is a level of accuracy and reclassification depth that simply is not achievable with manual methods.
Real Numbers: What Can a Cost Segregation Study Actually Save You?
Talk is cheap. Here are real results from seven recent studies we completed across a range of property types.
Note: All Year 1 savings estimates below reflect 100% bonus depreciation, which was restored for property placed in service after January 19, 2025 under the One Big Beautiful Budget Act (OBBBA). A 37% combined tax rate is used for all calculations.
Medical Office Building -- $8.37 Million Acquisition
A medical office building in New Jersey with an $8,370,000 acquisition price.
After our cost segregation study:
$2,020,329 reclassified to 5-year property
$1,529,196 reclassified to 15-year property
Total reclassified: $3,549,525 -- 42.4% of the total basis
With 100% bonus depreciation, the owner was eligible for approximately $1,313,000 in year-1 tax savings. The entire reclassified amount -- $3.55 million -- written off in a single tax year instead of spread over decades.
Apartment Complex -- $5.5 Million Acquisition
A multifamily apartment complex in Georgia with a $5,527,125 acquisition price.
After our study:
$883,259 reclassified to 5-year property
$761,651 reclassified to 7-year property (furniture and fixtures)
$1,054,105 reclassified to 15-year property (parking, site improvements)
Total reclassified: $2,699,016 -- 48.8% of total basis
Estimated year-1 tax savings: approximately $999,000.
Nearly half the value of the apartment complex shifted out of 27.5-year depreciation into faster classes. At 100% bonus depreciation, that entire reclassified amount is deductible in Year 1. That is the power of a thorough, engineering-based study.
RV Park -- $2.28 Million Acquisition
An outdoor hospitality property in Utah -- an RV park with a $2,279,662 acquisition.
This is one of the more striking results in our portfolio:
$364,183 reclassified to 5-year property
$1,567,740 reclassified to 15-year property (roads, hookups, utility lines, pads)
Total reclassified: $1,931,923 -- 84.8% of total basis
Estimated year-1 tax savings: approximately $715,000.
RV parks, campgrounds, and outdoor hospitality properties are among the best candidates for cost segregation because so much of the property value sits in land improvements -- the infrastructure that supports operations. These improvements qualify for 15-year depreciation under IRS rules, and with 100% bonus depreciation under the OBBBA, they can be written off entirely in the first year.
Medical Office Interior Build-Out -- $675,000
Even smaller properties deliver strong results.
A medical office interior build-out in New Jersey with a total depreciable basis of $675,000:
$443,079 reclassified to 5-year property
Total reclassified: 65.6% of the entire basis
Estimated year-1 tax savings: approximately $164,000.
On a $675,000 investment, $164,000 in first-year tax savings represents an extraordinary return -- and a cost segregation study for a property this size typically costs a fraction of that.
How Much Does a Cost Segregation Study Cost?
The cost of a cost segregation study depends on the size and complexity of the property. For most commercial properties, fees range from a few thousand dollars to around $15,000 for very large or complex projects.
The return on that investment is not subtle. Across the seven studies highlighted above, we delivered an estimated $4 million in combined year-1 tax savings on a total portfolio basis of approximately $23.9 million. The average cost of the studies was a fraction of one percent of the savings generated.
Who Should Get a Cost Segregation Study?
Cost segregation works best for:
Commercial property owners who purchased or constructed a property for $500,000 or more
Investors who acquired property in the last 5-10 years (lookback studies can recapture missed depreciation without amending returns)
Property types with high personal property or land improvement content: apartment complexes, hospitality properties, retail, medical, industrial, and RV parks
Taxpayers with significant ordinary income to offset -- the deductions are most valuable when you have income to shelter
It is also worth knowing that cost segregation is not a grey-area strategy. It is fully supported by the IRS tax code, established case law, and detailed IRS audit guidance. At USA Cost Segregation, our studies have been reviewed in 12-14 IRS audits -- with zero disallowments. Not one reclassification challenged. Not one deduction reversed.
That is the track record that matters.
What Sets USA Cost Segregation Apart?
Most cost segregation firms use a combination of manual analysis and basic software. We use a proprietary technology platform built on AI-driven precision engineering.
Every study we produce is calibrated against RS Means construction cost data, validated by certified engineers, and documented to withstand IRS scrutiny. The depth of our reclassification analysis -- consistently above industry averages -- is a direct result of the precision our technology platform enables.
And the results speak for themselves: 12-14 IRS audits. Zero disallowments.
How to Get Started
If you own commercial real estate, the first step is a free estimate. We can typically tell you within 24 hours what level of reclassification your property is likely to qualify for -- and what that means in real dollar savings.
Contact USA Cost Segregation to request a free analysis.
Frequently Asked Questions
Can I do a cost segregation study on a property I already own?
Yes. A lookback study allows you to capture missed depreciation from prior years without amending your returns. You file a Form 3115 (Change in Accounting Method) and take the catch-up deduction in the current year.
Does cost segregation work for residential rental properties?
Yes. Residential properties use 27.5-year depreciation as the base, but significant components -- land improvements, certain fixtures and equipment -- still qualify for faster write-offs.
What happens if I sell the property?
Accelerated depreciation is subject to depreciation recapture at sale (taxed at up to 25% for real property). However, many investors defer this through 1031 exchanges, continue to hold, or factor the recapture into their overall tax strategy. The time value of money typically makes cost segregation the right move even accounting for future recapture.
Is cost segregation legal?
Completely. Cost segregation is authorized under the Internal Revenue Code, supported by Treasury Regulations, Revenue Procedures, and decades of court decisions. The IRS even publishes a Cost Segregation Audit Techniques Guide to instruct its own agents on how to review these studies.
All figures in this article are based on actual USA Cost Segregation studies. Dollar amounts and property details have been anonymized. Tax savings estimates reflect 100% bonus depreciation as restored by the One Big Beautiful Budget Act (OBBBA) for property placed in service after January 19, 2025, and a 37% combined tax rate for illustration. Individual results will vary. Consult your tax advisor.